/Engine/Source/Runtime/SlateCore/Public/Widgets/DeclarativeSyntaxSupport.h
namespace RequiredArgs { template<typename Arg0Type, typename Arg1Type, typename Arg2Type, typename Arg3Type> [T4RequiredArgs](API\Runtime\SlateCore\Widgets\T4RequiredArgs)< Arg0Type &&, Arg1Type &&, Arg2Type &&, Arg3Type && > RequiredArgs::MakeRequiredArgs ( Arg0Type && InArg0, Arg1Type && InArg1, Arg2Type && InArg2, Arg3Type && InArg3 ) }